How to Use the Percentage Calculator (3-in-1)
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1
Choose your calculation mode: "What is X% of Y?", "X is what % of Y?", or "% Increase/Decrease from X to Y".
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2
Enter your values in the input fields.
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3
The result and mathematical formula breakdown appear in real-time.
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4
Copy the answer with one click.
Practical Example & Use Case
Common Real-World Scenario
Calculating a 15% sales discount, computing a 6% salary raise, or finding the percentage increase in website traffic.
Technical Notes & Limitations
Browser Engine Architecture
Calculates high-precision decimal percentage values instantly.
Frequently Asked Questions
How do you calculate percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100: ((New - Old) / Old) * 100.